so we need to respond to user with the entire route? just making sure as in project sheet: "the number, and departure time of the next bus or train leaving the source station that enables the passenger to reach the required destination station, and the expected final arrival time at the destination." Although it makes sense to output whole route, the specified answer implies (in my opinion) that we only needed to respond with the first instance of between station traveling, as well with time after subsequent steps that user will eventually arrive at destination. to reiterate, responding with entire route makes sense, but the project wording put me off a bit.